If you are looking for a real challenge, then try doing the RKC Plank. Invented by a former Soviet special forces trainer, ...

Get your stopwatch out.

Add Yahoo as a preferred source to see more of our stories on Google. Ah, the plank. It may just be one of the most intimidating exercises. Anyone who has shook their way through one knows that the ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Planks are a go-to exercise for delivering full-body benefits with zero equipment. “If done correctly, ...

George Hood completed around 1,500 sit-ups per day to train for the feat. An Illinois man who spent the past several months training seven hours a day, including 1,500 sit-ups daily, has broken the ...

Plank jacks are a dynamic exercise that combines the core-strengthening benefits of planks with the cardiovascular boost of ...

58-year-old grandmother of 12 DonnaJean Wilde has set the new Guinness world record for longest abdominal plank by a woman after holding the same position for just over four and a half hours. As ...

Welcome to Start TODAY. Sign up for our Start TODAY newsletter to receive daily inspiration sent to your inbox — and join us on Instagram! Ah, the plank. It may just be one of the most intimidating ...